y = 4+x troca y por x
4- x
x = 4 + y mmc= 4-y
4 - y
x(4-y) = 4 + y
4x - xy = 4 + y
4x - 4 = xy + y
y( x+1) = 4x - 4
y = 4x - 4
x + 1
f(x)¨-1 = 4x - 4
x + 1
f(3)¨-1 = 4.3 - 4 = 12-4 = 8 = 2
3 +1 4 4
f(-3)¨-1 = 4.(-3) - 4 = -12-4 = - 16 = 8
- 3 +1 -2 -2
f(3)¨-1 + f(-3)¨-1 = 2+8 = 10
